This standard was last reviewed and confirmed in 2019.
Therefore this version remains current.
Abstract
PreviewOn separate test portions the following determinations are carried out: measurement of the apparent pH in methanolic medium; determination of the water content; determination of the distribution of primary, secondary and tertiary amines contents; determination of oxyethylene groups content; determination of sulphated ash. Furthermore an aqueous or methanolic solution of a test portion is prepared and the free polyethylene glycols are isolated. On the separated polyethylene glycols the absence of nitrogen is verified and their relative molecular mass is determined.
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Status: PublishedPublication date: 1981-04
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Edition: 1Number of pages: 7
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- ICS :
- 71.100.40 Surface active agents
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en
| Format | Language | |
|---|---|---|
| std 1 61 | ||
| std 2 61 | Paper |
- CHF61
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